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-rw-r--r--src/libregex/lib.rs1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/libregex/lib.rs b/src/libregex/lib.rs
index 9ad02afee99..c546477ee01 100644
--- a/src/libregex/lib.rs
+++ b/src/libregex/lib.rs
@@ -373,6 +373,7 @@
 #![allow(unknown_features)]
 #![feature(macro_rules, phase, slicing_syntax, globs)]
 #![feature(unboxed_closures)]
+#![feature(associated_types)]
 #![deny(missing_docs)]
 
 #[cfg(test)]